William l



W. L. MCDOWELL. Hob-Air Register.

Patented Feb. 8, 1870.

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N. PETERS, PNOTD-LITHDGRAPHER. WASHINGTON, o c.

WILLIAM L. MoDOWELL, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 99,692

, dated February 8, 1870,.

REGISTER FOR AIR-I'LUES.

The Schedule referred to in these Letters Patent and making part of the same.

I, WILLIAM L. MoDowELL, of the city of Philadelphia, in the State of Pennsylvania, have invented certain Improvements in Registers for Air-Flues, of which the following is a specification.

Nature and Objects of the I ncention.

My invention relates to the combination ofa lever, a ratchet-toothed sector, and a pawl or detent, with the valve-plate and flame of a register, for either hot or cold-air flues, in such a manner that, bymeansj of the lever, the pawl or detent can be raised out of connect-ion with the teeth of the sector, and the valveplate allowed to be closed against its frame, and also so that by simply pressing the said lever downward, the pawl or. detent will slip freely over the teeth of the sector, and retain the valve-plate in the air-flue at any angle in relation to its frame that mayhe desired by the operator of the lever; the object of my invention being to afford greater facility in closing the valveplate, and in adjusting its position in the flue, so as either to divide the draught into any two separate currents, or to cause the whole of it to pass either through the flue or through the register, as may be desired.

Description of the Accompanying Drawings.

V Figure 1 is a side elevation of a register having one side of its frame removed, in order to exhibit my invention embodied therein.

Figure 2 is a view of the oppositeside of my invention, as in connection with a section of the side of the frame, which is mentioned as being absent from fig. 1.

General Description.

centre of the sector D, together with a flat plate, 11",

on the edge of the sector, whereby the said sector is riveted fast to the valve-plate B, so that .t-he said journal d will rest in its bearing in the side a of the frame A. V

The circular edge of the sector has a series of ratchetteeth, d, which pitch toward the back part or flue-side of the register. 1

The pawl or detent. E is pivoted to the plate a" of the frame A, and has a V-shaped tooth,-c', on its inner side, which fits in between any two of the series of teeth at: (See fig. 2.), i

The lever O has its fulcrum-pin c' in the inner end (1 of the curve of the sector, and its powerend 0" projeoting through the front and close to one side of the frame A.

Its upper edge is curved, to form a cam-surface corresponding in line with the base of the series of teeth on the sector D, and rests partly around upon the cylindrical shoulder of the journal d, (see fig. 1,) and is prevented by an offset, 0, which will come in contact with the sector D, and thus prevent the lever G from being lifted too high. (See fig. 2.)

It will now be understood, without further .description, that when the power end 0" of the lever G is raised, as indicated by the dotted lines z, fig. 2, itwill lift the pawl or detent E, and thus permit the valveplate B to be closed by lowering it, by turning it on its journals, against the frame A, and that by pressing the end 0" of the lever G downward, the said valve plate will be raised thereby, and that the tooth c of the pawl or detent E will slip over the ratchet-teeth, and eventually hold the said valve-plate at whatever position within the fiue to which it may have been elevated, whether the posit-ion be to entirely close the flue, as indicated by the dotted lines o, fig. 1,-or only partially, so as-to divide the draught between the said flue and the register-opening, as shown at w, in both figures, the dotted line 1 in fig. 1, indicating the back of the said fine.

The front end of the sector D may, if desired, be made witha projecting stem at a point a little above the stem 0" of the lever O, as indicated by the dotted lines it, in fig. 1, so that by placing ones thumb upon it, the endo" of the lever ,0 may be raised by the finger, and the valve-plate thus be operated by ones thumb and finger; but the simple projection c of the lever is believed to be'the better device for the purpose, especially when the register is located near the floor of the room, because it permits the valve-plate B to be operated as well by ones foot.

Claim.

I claim as m invention- In combination, with the valve-plate and frame of of a register or ventilator, the lever O, sector 1), and pawl or detent E, substantially as and. for the purpose hereinbefore set forth.

WM. L. MoDOWELL. Witnesses:

BENJ. Momsos, WM. H. Monrsogv. 

